US2669689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining earth for mation factors
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1945-04-13
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Granted: 1954-02-16
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Expires: 1965-04-13
Abstract
No abstract record available.
Inventors
- 👤 Doll Henri-Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:52
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1537919A
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US1826961A
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US1895643A
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US2233420A
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US2364957A
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US2330394A
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US2415636A
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US2392357A
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US2427950A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |